What is the frequency of light emitted when an electron in a hydrogen atom jumps
from 2nd orbit to 1st orbit?

The runner's acceleration during the race is 0.5 m/s².

To find the runner's acceleration, we will use the formula for acceleration, which is:

Acceleration (a) = (Final Velocity (vf) - Initial Velocity (vi)) / Time (t)

Given that the runner starts at 0 m/s (Initial Velocity) and ends at 3 m/s (Final Velocity) in 6 seconds (Time), we can plug these values into the formula:

a = (3 m/s - 0 m/s) / 6 s

a = 3 m/s / 6 s

a = 0.5 m/s²

The runner's acceleration during the race is 0.5 m/s².

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Answer:

The best explanation is that the first person is grounded to the earth, and his/her body either draws up negative charges from the earth, or tend to conducts negative charges to the earth, depending on the charge on the balloon.

Explanation:

The earth is an infinite store for charges. In the first case where the second person brings a negatively charged balloon towards the first person, the negative charges on the balloon induces the first person's body to tend to attract the negative charges on the balloon through the first person's body to the positive charges within the earth. In the second case when again a positively charged balloon is brought near the first person's hair, the positive charges on the balloon induce the first person's body into drawing up negative charges from within the earth. This charges, and their opposite induced charges, create an attractive force between the hair strands and the balloons.

aaaaaaaaaaaaaaaaaaaaaaaaaaaaa

Newton's 2nd law of motion says:

Net force = (mass) · (acceleration) .

Newton didn't make up this law for his health.

Let's use it to answer this question about the car moving down the road.

Net force on the car = (car's mass) · (car's acceleration).

But the net force on the car is zero.  So we can write:

0 = (car's mass) · (car's acceleration).

Look at the right side of this equation.

Newton's law tells us that the product of the car's mass and the car's acceleration is zero.

That tells us that at least one of three things must be true.

Either 1). the car's mass is zero, or 2). the car's acceleration is zero, or 3). Newton was crazy.

We're pretty sure that 1). and 3). are false. The car's acceleration is zero.

What does this mean ? It means that the car's speed and direction are not changing.

That's exactly what Choice-B says.

Answer:

Option C

Explanation:

Hydrocarbon + Oxygen = Carbon dioxide + Water

is example of combustion reaction

Given :

A 1200 kg truck traveling at 20 m/s towards the east.

To Find :

The magnitude and direction of the momentum.

Solution :

We know, momentum is given by :

Momentum, P = mv

P = 1200 × 20 kg m/s

P = 24000 kg m/s

Now, we know, direction of momentum is same as the direction of velocity.

Therefore, momentum of truck is 24000 kg m/s and direction is towards the east.

The available options are:

A. bartenders serving alcohol

B. students identifying their professors.

C. Doctors diagnosing cases of schizophrenia.

D. eyewitnesses identifying suspects from a lineup.

Answer:

A.  bartenders serving alcohol

Explanation:

This is because of the underage rule concerning sale of alcohol. Thus, there are occasional period in which underage person or a minor will want to buy alcohol, and without necessarily asking for the birth certificate or ID card that contains Age information, it is therefore, necessary for bartenders to be able to tell the age of their unfamiliar customers, by mere looking at them, so as not to sell to a minor.

Hemce, Rhodes research in guessing the age of unfamiliar person has important implications for BARTENDERS SERVING ALCOHOL, because it will guide them to determine Underage or Minor, that want to buy alcohol from them.

The car that starts from rest and travels 243 m in 7.86 s with constant acceleration has a velocity when it crosses the finish line of: 61.82 m/s

The formulas and procedures we will use to solve this exercise are:

Where:

Information about the problem:

Applying the acceleration formula we have:

a = 2 * [x - (vi * t)] / t²

a = 2 * [243 m - (0 m/s * 7.86 s)] / (7.86 s)²

a = 2 * [243 m - (0 m)] / 61.779 s²

a = 2 * [243 m] / 61.779 s²

a = 486 m/ 61.779 s²

a = 7.866 m/s²

Applying the final velocity formula we have:

vf = vi + (a * t)

vf = 0 m/s + (7.866 m/s² *7.86 s)

vf = 0 m/s + 61.82 m/s

vf = 61.82 m/s

It is a physical quantity that indicates the variation of velocity as a function of time, it is expressed in units of distance per time squared e.g.: m/sec2 ; km/h2

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The magnitude of force of gravity on an object, mg is called weight of the object on earth.

In physics, gravity (from Latin gravitas 'weight') is a fundamental interaction which reasons mutual enchantment between all matters with mass or strength. Gravity is, by a long way, the weakest of the 4 fundamental interactions, approximately 1038 instances weaker than the strong interaction, 1036 times weaker than the electromagnetic pressure and 1029 times weaker than the weak interaction.

As an end result, it has no significant have an impact on at the level of subatomic debris. but gravity is the most significant interaction among objects at the macroscopic scale, and it determines the movement of planets, stars, galaxies, or even mild.

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Complete Question: -

The magnitude of the force of gravity on an object, mg", is called the object's.

There are three kinds of forces within the atom:

  i) Electromagnetic force of attraction between the electrons and protons

  ii) Electromagnetic force of repulsion between the protons or weak nuclear force

  iii) Strong nuclear force between the electrons and protons

The electromagnetic force of attraction:

Weak nuclear force:

Strong nuclear force:

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Answer:

1.)Electrons surrounding a nucleus are attracted to the protons within it because electrons and protons have opposite charges. Electrons closest to the nucleus are attracted with such a force that they can’t escape from the atom. These electrons tend to shield the protons from electrons that are farther away because electrons have the same charge and repel each other. Electrons that are farther away have less attraction to the protons within the nucleus and are more likely to be detached from the atom.

2.)Electrons can be transferred from atoms of one body to atoms of another body through friction. This can occur when one body is rubbed against another or when a liquid flows across a solid. In either case, one body may be given a positive charge while the other body is given a negative charge of the same magnitude. Both charges are developed at the same time. Electrons can also be transferred from one body to another when a charged body comes into contact with an uncharged body. The electrons move in the direction that will equalize the charges; thus, the uncharged body will be given the same charge as the charged body.

3.)Free electrons move from points of negative charge to points of positive charge. When these electrons move freely from one point to another with little resistance, the material they’re traveling through is said to be a conductor. Conductors have a large number of free electrons. Insulators, on the other hand, have very few free electrons and offer great resistance to the movement of these electrons. Electric charges produced on one end of a body composed of insulating materials will most likely not spread throughout the body. In a conductor, this charge would spread throughout the entire body. Metals are generally conductors; oils, rubber, air, porcelain, and plastics are good insulators.

4.)Lightning is produced by the rapid transfer of free electrons when one of the following conditions exist:

One part of a cloud is positively charged and a neighboring part of the same cloud is negatively charged.

A positively charged cloud comes near a negatively charged cloud.

A cloud with either a positive charge or a negative charge comes near the earth.

Explanation:

PENN FOSTER

Force equals mass time acceleration. Weight is a force and it can replace force in the equation. The acceleration would be gravity, which is an acceleration.

1.)

Fw (weight) = m (mass) · g (gravity, 9.8 m/s²)

Fw = m * 9.81 m/s²

560N = m · 9.81 m/s²

m ≈ 57.08 kg

2.)

d = 350 meters

t = 65 seconds

velocity = d/t

velocity = 350 meters / 65 seconds

velocity ≈ 5.38 meters/sec

3.)

Force = 35N

Distance = 2 meters

Work = Force · Distance

Work = 35N · 2 meters

Work = 70 J

Answer:

Sodium is stored under paraffin oil

Explanation:

Group 1 metals are known to be very highly reactive. The chemical reactivity of the members of the group decreases down the group.

Sodium reacts violently with water and upon exposure to the atmosphere. As a result of this, it must be stored under paraffin oil.

Answer:

The pressure value changes 400 % relative to the initial value.

Explanation:

Let suppose that the gas behaves ideally and represents a closed system, that is, a system with no mass interactions so that number of moles is conserved (\(n\)). Since the variables involved in the isothermal process are pressure (\(P\)) and volume (\(V\)). Finally, the process is represented by the following relationship:

\(P_{1}\cdot V_{1} = P_{2}\cdot V_{2}\) (1)

Where:

\(P_{1}, P_{2}\) - Initial and final pressures.

\(V_{1}, V_{2}\) - Initial and final volumes.

If we know that \(P_{1} = P_{o}\), \(V_{1} = V_{o}\) and \(V_{2} = 0.2\cdot V_{o}\), then the final pressure of the closed system is:

\(P_{2} = P_{1}\cdot \left(\frac{V_{1}}{V_{2}} \right)\)

\(P_{2} = 5\cdot P_{o}\)

The pressure value changes 400 % relative to the initial value.

False, If an object is accelerating toward a point, then it must not be getting closer and closer to that point.

Acceleration is the rate at which speed and direction of velocity vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates. An object has positive acceleration if it is accelerating and traveling in the right direction. Positive acceleration was demonstrated in the first example by the speeding car. The acceleration is occurring in the same direction as the car's motion, which is forward and speeding up. The meter per second squared (m s2) is the unit of acceleration used in the SI system.

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75.064 cm

Explanation

to solve this we need to know the equivalence

then

let's use a equivalente fraction to convert the measure

hence, the answer is 75.064 cm

I hope this helps you

Answer:

La frecuencia que percibe el observador es 463 Hz.

Explanation:

El efecto Doppler se define como el cambio de frecuencia aparente de una onda producida por el movimiento relativo de la fuente respecto a su observador. En otras palabras, este efecto es el cambio en la frecuencia percibida de cualquier movimiento ondulatorio cuando el emisor y el receptor, u observador, se desplazan uno respecto a otro.

La siguiente expresión se considera el caso general del efecto Doppler:

\(f'=f*\frac{v+-vR}{v-+vE}\)

Donde:

Utilizaremos el signo +:

En el numerador si el receptor se acerca al emisor

En el denominador si el emisor se aleja del receptor

Utilizaremos el signo -:

En el numerador si el receptor se aleja del emisor

En el denominador si el emisor se acerca al receptor

En este caso:

Y como el receptor se aleja del emisor, la expresión del efecto Doppler queda determinada como:

\(f'=480 Hz*\frac{340 m/s-12 m/s}{340 m/s-+0 m/s}\)

Resolviendo se obtiene:

\(f'=480 Hz*\frac{340 m/s-12 m/s}{340 m/s}\)

\(f'=480 Hz*\frac{328 m/s}{340 m/s}\)

f'= 463 Hz

La frecuencia que percibe el observador es 463 Hz.

Answer: The velocity of the bullet will be more than half of its earlier velocity

Explanation: I did it on a test and it was right because i calculated 30 degrees within 25 seconds and it was half times the velocity

i hope this helps sorry if i got it wrong

Answer:

problem 1 would be 2 homogeneous & 2 heterogeneous

problem 2 would be 4 tall and 0 short

Explanation:

if you fill in the boxes, homo is same and heterogeneous is different. the big letter determines if it is tall or short as well.

Answer:

50.2 meters

Explanation:

When an object falls, it goes a distance d in time t according to the formula:

\(d=\frac{1}{2}*g*t^{2}\)

d is the distance in meter, g is the acceleration due to gravity with the value of 9.8\(m/s^{2}\) , t is the time in seconds

Therefore, \(d = \frac{1}{2}*9.8*(3.2)^{2}\)

d= 50.176 ≈ 50.2m

Answer:

350 m/s

Explanation:

Before the explosion, the rocket's momentum is given by:

p = m*v where

p = momentum

m = mass of the rocket

v = velocity of the rocket

Given that the mass of the rocket is 5 kg and its velocity is 200 m/s, we can calculate the momentum as:

p = m*v = 5 kg * 200 m/s = 1000 kg·m/s

After the explosion, the momentum is conserved, which means the total momentum of the two parts is still 1000 kg·m/s. We can use this principle to solve for the velocity of the second part.

Let v1 be the velocity of the 3 kg part, and v2 be the velocity of the other part. Since they are both moving in the same direction, we can write:

p = m1v1 + m2v2

where m1 = 3 kg is the mass of the first part, and m2 is the mass of the second part.

Substituting the known values, we get:

1000 kg·m/s = 3 kg * 100 m/s + m2 * v2

Solving for v2, we get:

v2 = (1000 kg·m/s - 300 kg·m/s) / m2

v2 = 700 kg·m/s / m2

We still need to find the mass of the second part. Since the rocket initially had a mass of 5 kg, and one part has a mass of 3 kg, the other part must have a mass of:

m2 = 5 kg - 3 kg = 2 kg

Substituting this into the equation for v2, we get:

v2 = 700 kg·m/s / 2 kg

v2 = 350 m/s

Therefore, the unknown speed of the other part is 350 m/s.

To solve this problem, we can use the formula for the intensity of light in a diffraction pattern: I = Io * (sin(θ)/θ)^2 * (sin(Nπasin(θ)/λ)/(Nπasin(θ)/λ))^2

where:

I = Intensity of light at a certain point on the screen

Io = Intensity at the peak of the central maximum

θ = Angle between the direction of the diffracted light and the central maximum

N = Number of bright fringes away from the central maximum

a = Width of the slit

λ = Wavelength of light

Given:

λ = 620 nm = 620 x 10^(-9) m

Slit width = 0.450 mm = 0.450 x 10^(-3) m

Distance to the screen (D) = 3.00 m

a) Distance from the center of the central maximum = 1.00 mm = 1.00 x 10^(-3) m

To find the angle θ, we can use the small angle approximation:

θ = Distance / Distance to the screen = (1.00 x 10^(-3)) / 3.00 = 3.33 x 10^(-4) radians

Using the formula, we can calculate the intensity:

I = Io * (sin(θ)/θ)^2 * (sin(Nπasin(θ)/λ)/(Nπasin(θ)/λ))^2

For the central maximum (N = 0), the second term becomes 1:

I = Io * (sin(θ)/θ)^2

b) Distance from the center of the central maximum = 3.00 mm = 3.00 x 10^(-3) m

Using the same method as above, we calculate the angle θ:

θ = (3.00 x 10^(-3)) / 3.00 = 1.00 x 10^(-3) radians

c) Distance from the center of the central maximum = 5.00 mm = 5.00 x 10^(-3) m

Using the same method as above, we calculate the angle θ:

θ = (5.00 x 10^(-3)) / 3.00 = 1.67 x 10^(-3) radians

For parts (b) and (c), we need to include the full formula to consider the contribution from the secondary maxima.

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Answer:

a)

Weight in Air = 0.3N

Weight in Water = 0.25N

Weight in Liquid = 0.24N.

Upthrust /Buoyant Force = Weight in Air – Weight in Fluid(Water in this case)

= 0.3 – 0.25

= 0.5N.

b) R.D of Body = Density of Body/Density of Standard Fluid(Water).

There's a Derived Formula for RD.

I'm gonna Apply it here.

Ask me for the derivation in the Comment section if you need it.

RD = α/ρ = (Weight in Air) / (Upthrust Force)

Where

α = density of the Body(or reference substance)

ρ = density of standard fluid (water)

= 0.3/0.05 = 6.

c) RD of Liquid = (Density of Liquid) /(Density of standard Fluid(water)

Or we just go by that formula

RD of Liquid = Weight in Air/Upthrust(In Liquid)

We'll be using the Upthrust in that Liquid now.

= 0.3 – 0.24 = 0.06

RD = 0.3/0.06 = 5.

Answer:

b

Explanation:

The relative distance can calculate by dividing the time travelled by the speed difference between points A and B. Considering that B is going more quickly than A, we substract A's speed from B's speed.

Relative Speed = Speed of B - Speed of A

Relative Speed = 6 km/h - 5 km/h

Relative Speed = 1 km/h

Now, we can calculate the relative distance traveled by B after 2 hours:

Relative Distance = Relative Speed * Time

Relative Distance = 1 km/h * 2 hours

Relative Distance = 2 km

Therefore, B will be 2 kilometers away from A after 2 hours of walking in the same direction.

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To derive the algebraic equation for the vertical force, we must consider the forces acting in the vertical direction and apply Newton's second law of motion.

Newton's second law states that the net force acting on an object is equal to the product of its mass (m) and its acceleration (a). In the vertical direction, the forces that typically act on an object are gravity and any other forces such as the normal force or applied forces.

Assume that the vertical force is denoted as Fv. Forces acting in the vertical direction are typically mass (mg) and the normal force (N) exerted by the surface, if present. Therefore, the equation for the vertical force can be expressed as:

Fv = N - mg,

where:

Fv is the vertical force,

N is the normal force,

m is the mass of the object,

g is the acceleration due to gravity (approximately 9.8 m/s² on Earth).

The normal force N is equal to the weight of the object if the object is at rest on a horizontal surface. In this case, N = mg. However, if the object is on an inclined plane or is subject to other forces, the normal force may differ from the weight.

By substituting the appropriate values ​​for the normal force and mass (mg), you can derive an algebraic equation for the vertical force based on the specific scenario you are considering.

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Answer:

1600 N

Explanation:

pascals principle says..

\(\frac{A_{out}}{A_{in}} = \frac{F_{out}}{F_{in}} \\\)

so lets do

\(\frac{2}{4} = \frac{x}{3200}\)

so multiply one half (2/4 simplified) by 3200

1600 is equal to x

1600 N

YAAAAAAAAAAAAAAY

The maximum current in the inductor is approximately 1.21 amperes when a 5.05 μF capacitor initially charged to 15.2 V is connected in series with a 3.75 mH inductor.

To determine the maximum current in the inductor when a 5.05 μF capacitor initially charged to a potential of 15.2 V is connected in series with a 3.75 mH inductor, we can use the formula for the resonant frequency of an LC circuit.

The resonant frequency (fr) of an LC circuit is given by:

fr = 1 / (2π√(LC))

Given:

C = 5.05 μF = 5.05 × \(10^{-6}\)F

L = 3.75 mH = 3.75 × \(10^{-3}\) H

Plugging the values into the formula:

fr = 1 / (2π√(5.05 × \(10^{-6}\) × 3.75 × \(10^{-3}\)))

  = 1 / (2π√(1.89125 ×\(10^{-8}\)))

  ≈ 530,012 Hz

The maximum current (Imax) in the inductor can be calculated using the formula:

Imax = V / Xl

Where:

V is the initial potential (voltage) across the capacitor (15.2 V), and

Xl is the inductive reactance.

The inductive reactance (Xl) is given by:

Xl = 2πfL

Plugging the values into the formula:

Xl = 2π(530,012)(3.75 × \(10^{-3}\))

  ≈ 12.556 Ω

Plugging the values into the formula for Imax:

Imax = 15.2 V / 12.556 Ω  ≈ 1.21 A

Therefore, the maximum current in the inductor is approximately 1.21 amperes.

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Answer:

It does not come to a complete stop immediately because of inertia.

Explanation:

Inertia is the reluctance of an object to change its state of motion or rest. In this case, it is the state of motion since the ship was moving initially. Inertia is directly related to mass. Thus, the heavier the mass, the larger the inertia. The ship has a large mass and therefore it has a large inertia. This causes the ship to slowly come to a stop instead of stopping immediately when the engines are switched off.